Treenail-machine



UNiTED STATES PATENT oFFioE.

ELBRIDGE WEBBER, OF GARDINER, MAINE.

TREENAIL-MACHINE.

Speccation of Letters Patent No. 14,173, dated January 29, 1856.

To all whom it may concern:

Be it known that I, ELBRIDGE IVEBBER, of Gardiner, in the county ofKennebec and State of Maine, have invented a new and useful Improvementin Treenail-Machines; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawing, forming part ofthis specification, in which- Figure 1 is a plan of the machine. Fic'. 2is a vertical section on line x of Fig. 1. Fig. 3 is a vertical sectionon line y y of Fig. 1. Fig. 4 is a section on line z e of Fig. 3parallel to the axis of the socket.

Similar letters of reference in the several figures denote the same partof the machine.

The nature of my invention consists in the construction of the cuttingapparatus of a traversing box, opening at one side upon an inclined seatto which the cutters or bits are fixed, and having the port-ion of theform opening which lies below the plane of the bitseat produced, movableperpendicular to said seat, whereby the change in size of form openingis effected with great facility, and the entire cutting apparatusgreatly simplified.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation.

In the dra-wing A is the frame on the ways a a of which the carriage Btraverses, it being attached to the rack C which meshes into the pinionD on the shaft E. This shaft is rotated by power applied to the wheel F,through the cog wheels G and H. The shaft I of the latter carries alsothe beveled cog` wheel IV, which by meshing into the beveled wheel WVrotates the socket S simultaneously with the translation of the carriageB. The tail block K and screw L are placed on t-he frame to be used inturning stuff requiring tobe secured at both ends, and are not essentialto the operation of the machine. Upon the carriage B, is the cutter boxP, in the peculiar construction of which this in- Vention consists. Onits inclined face b lie the cutters c and d secured by the bolt-s e, onecutter being a gouge and the other an oblique chisel. Through the boxruns t-he gage rod g, its lower extremity resting upon the set screw hso as to be moved longitudinally by turning said screw. The upperextremity of the gage rod conforms to the opening in the box, andconstitutes so much of the form opening as lies below the plane of thebit seat produced. In the head is the roller z' for diminishing frictionas the treenail passes over the head of the gage rod. Instead of theroller z' as shown in the drawings, there may be three or more balls, ora concave roller, in the upper end of the gage rod, for effecting thesame purpose as the roller z'. These rollers serve their legitimatefunction only, and need not be considered as essential to theconstruction of my box, as it will operate without them.

The operation of this machine is as follows: One extremity of the pieceof wood from which the treenail is to be turned, is secured into thesquare socket s and the other extremity entered into the mouth of thebox P, the gage rod g being adjusted to give the requisite size to thetreenail by turning the set screw. rlhe wheel F is then revolvedproducing the rotation of the securing socket, and block from which thetreenail is to be turned, and the simultaneous movement of the box Ptoward the head of the socket s, the cutters c and d giving the properform to the treenail as it passes through the box. The open mouth of thebox admits of the treenail being turned so that any curvature of theblock will be followed, and the treenail turned without cutting acrossthe grain. The roller z' in the end of the gage rod g prevents a greatdeal of the friction that would necessarily take place between thetreenail and the head of the gage rod, as the action of the cutters willalways cause a. greater pressure of the t-reenail against the head ofthe gage rod than against any other part of the box.

The importance of a simple adjustment of the box and of diminishingfriction to as great an extent as practicable, will be apparent to everyone acquainted with machines of this character and need not here bediscurted upon.

Disclaiming the traversing of the forming box over the treenail, and thealteration of the size of the treenail by the expansion and contractionof the cutter box, broadly considering, I claim as an improvementintreenail machines- The construction of the traversing forming box, of aflaring mouthed bitholder, combined with a slide g, whose upper surfacecomposee so much of the form box signed my naine before tWo subscribingWitopening,d as lies belongl thel: plane kof the1 bit nesses. seat proneed, per )en ieu ar to W ich ane said slide is adjustiible, forchanging thi; size' ELBRIDGE WEBBER' of the treenail, the operationbeing as herein Witnesses: set forth. JOSEPH M. MISERVE,

In testimony whereof, I have hereunto GEO. VULArrr.

